CN113699897B - Steel box girder sliding construction device and method - Google Patents
Steel box girder sliding construction device and method Download PDFInfo
- Publication number
- CN113699897B CN113699897B CN202110967853.2A CN202110967853A CN113699897B CN 113699897 B CN113699897 B CN 113699897B CN 202110967853 A CN202110967853 A CN 202110967853A CN 113699897 B CN113699897 B CN 113699897B
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- steel box
- box girder
- jack
- sliding
- girder
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
The invention relates to a device and a method for sliding construction of a steel box girder.A temporary support is arranged at a position to be constructed, a plurality of grooves are distributed on the temporary support along the length direction of the steel box girder, at least one jack is vertically arranged in each groove, and the jacks are respectively and controllably connected with a first controller; the top of each jack is provided with an electric roller for placing the steel box girder, the shaft of each electric roller is vertical to the length direction of the steel box girder, and a plurality of electric rollers are in control connection with a second controller. The lifting jack provided by the invention has the advantages that through the cooperative work of lifting and rolling of the driving wheel, the steel box girder is prevented from being empty and rapidly sliding in the installation process, the continuous sliding in the erection construction process of the steel main girder is realized, the sliding speed is freely adjusted, and the accuracy and timeliness of temporary support elevation control in the sliding process are improved.
Description
Technical Field
The invention relates to the field of bridge construction, in particular to a steel box girder sliding construction device and method.
Background
Walking type pushing is one of the important methods for modern bridge construction, and is increasingly applied to the erection of steel box girders. However, most of the steel box girders are continuously changed in line shape along the longitudinal direction and the transverse direction of the bridge, and factors such as pre-camber and foundation settlement need to be superposed, and the temporary supporting heights on the two sides of the pushing jack need to be continuously adjusted in the jacking process of the steel box girders, so that the stress of each pivot of the steel box girders is consistent with the design when the pushing vertical jack returns oil, and the stress safety of the steel box girders and the temporary piers is ensured. At present, each group of jacks is generally observed by a specially-assigned person, and when the temporary supporting height is found to deviate to a certain amount according to simple observation and measurement results, the height of the temporary supporting jacks is adjusted. Receive the restriction of artifical measurement frequency and precision, the interim supporting height of jacking in-process not only measuring error is big, efficiency of software testing is low, needs the more human cost of cost, and often appears interim supporting height adjustment untimely, leads to the steel girder to take off the sky or jack-up too high phenomenon, has very big structural safety hidden danger, pushes up the operation of in-process more operating personnel at the bottom of the beam simultaneously, and operating personnel's personal safety can not effectively be guaranteed. In addition, the existing pushing jack needs to go through the process of pushing, returning and pushing again, so that the walking type pushing speed is slow, and the control technical requirement of the construction process is high.
Disclosure of Invention
The invention provides a steel box girder sliding construction device and method, and solves the technical problem that the walking type pushing speed is slow in the prior art.
According to the device for the sliding construction of the steel box girder, a temporary support is arranged at a position to be constructed, a plurality of grooves are distributed on the temporary support along the length direction of the steel box girder, at least one jack is vertically arranged in each groove, and the jacks are respectively connected to a first controller in a control mode; the top of each jack is provided with an electric roller for placing the steel box girder, the shaft of each electric roller is vertical to the length direction of the steel box girder, and a plurality of electric rollers are in control connection with a second controller.
The device for the sliding construction of the steel box girder is further improved in that a plurality of electric rollers are provided with guide beams, the guide beams are arranged along the length direction of the steel box girder, and the guide beams are provided with connecting pieces for detachably connecting the front ends of the steel box girder.
The device for the sliding construction of the steel box girder is further improved in that a stress monitoring device is arranged on each jack.
The device for the sliding construction of the steel box girder is further improved in that the first controller is connected with the jacks through leads, and the second controller is connected with the driving wheels through leads.
The invention also provides a construction method for sliding the steel box girder, which comprises the following steps:
arranging a temporary support between the starting point and the end point of the sliding of the steel box girder, wherein a plurality of grooves are distributed on the temporary support along the length direction of the steel box girder;
at least one jack is vertically arranged in each groove, and the jacks are respectively and controllably connected with a first controller; the top of each jack is provided with an electric roller, the shaft of each electric roller is vertical to the length direction of the steel box girder, and a plurality of electric rollers are connected to a second controller in a control way;
placing the steel box girder above part of the groove;
opening the first controller, and controlling the jack in the groove to lift up the steel box girder until the stress of the jack reaches a preset value;
and opening the second controller to control the plurality of electric rollers to roll towards the direction of the termination point and drive the steel box girder to move towards the direction of the termination point.
The method for the sliding construction of the steel box girder is further improved in that a stress monitoring device is arranged on the jack, and the stress of the jack is monitored in real time through the monitoring device in the moving process of the steel box girder.
The method for the sliding construction of the steel box girder is further improved in that when the plurality of electric rollers are controlled to roll towards the direction of the termination point and drive the steel box girder to move towards the direction of the termination point, the stress range of the jack is set, if the stress value monitored by the monitoring device is not in the stress range, the height of the jack is adjusted until the stress value measured by the monitoring device is in the stress range.
The method for the sliding construction of the steel box girder is further improved in that before the steel box girder is placed above part of the groove, a guide girder is detachably arranged at the front end of the steel box girder along the length direction of the steel box girder through a connecting piece, and the guide girder is placed on the groove;
when the jack in the groove is controlled to jack up the steel box girder, the jack in the groove below the guide beam is controlled to jack up the guide beam at the same time;
when the plurality of electric rollers are controlled to roll towards the direction of the termination point and drive the steel box girder to move towards the direction of the termination point, the plurality of electric rollers simultaneously drive the guide girder to move towards the direction of the termination point.
Compared with the prior art, the invention has positive and obvious effect. The invention solves the technical problem of slow walking type pushing speed in the prior art through the jack with the driving wheel. The lifting jack provided by the invention has the advantages that through the cooperative work of lifting and rolling of the driving wheel, the steel box girder is prevented from being emptied and is quickly slid in the installation process, the continuous sliding in the erection construction process of the steel main girder is realized, the sliding speed is freely adjusted, the accuracy and timeliness of temporary support elevation control in the sliding process are improved, the labor cost in the pushing process is reduced, the safety in the pushing process is improved, and the construction quality is ensured.
Drawings
Fig. 1 is a side view showing a state in which the steel box girder slide-in construction apparatus of the present invention is used.
Fig. 2 is a plan view showing a state of use of the apparatus for slide-in construction of a steel box girder according to the present invention.
Fig. 3 is a structure view of a jack of the device for sliding the steel box girder into construction according to the present invention.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1, 2 and 3, in the device for sliding a steel box girder into construction of the present invention, a temporary support 1 is arranged at a place to be constructed, a plurality of grooves are arranged on the temporary support 1 along the length direction of the steel box girder 4, at least one jack 2 is vertically arranged in each groove, and the plurality of jacks 2 are respectively and controllably connected to a first controller 5; the top of each jack 2 is provided with a motor-driven roller 3 for placing the steel box girder 4, the shaft of each motor-driven roller 3 is vertical to the length direction of the steel box girder 4, and a plurality of motor-driven rollers 3 are in control connection with a second controller 6.
Temporary supports 1 should be provided on both banks of the river 8 and in the river 8. The device accessible first controller 5 control jack 2's the lifting height to the atress size of control jack 2, the slew velocity and the direction of rotation of controlling electronic gyro wheel 3 through second controller 6, thereby the translation rate of control steel box girder 4. Jack 2 evenly spaced arrangement is in the recess to be favorable to a plurality of jacks 2 to the support evenly distributed of steel box girder 4, avoid steel box girder 4 to produce and warp. Jack 2 passes through wire 7 with first controller 5 and is connected, and electronic gyro wheel 3 passes through wire 7 and is connected with second controller 6 to make first controller 5 and second controller 6 can set up at the bank, reduce handling cost, avoid damaging the device.
Further, the surface of the electric roller 3 can be covered with a rubber layer to improve the friction force with the steel box girder 4 and improve the moving efficiency.
Preferably, a plurality of electric rollers 3 are provided with a guide beam, the guide beam is arranged along the length direction of the steel box girder 4, and the guide beam is provided with a connecting piece for detachably connecting the front end of the steel box girder 4.
The connecting piece is a thick steel plate or profile steel which is embedded in a top plate and a bottom plate at the front end of the steel box girder 4 and extends out of the girder end, and then is connected with the guide girder after being assembled and formed. The guide beam is used for assisting the installation of the steel box girder 4, ensuring the longitudinal anti-overturning stability of the steel box girder 4 when moving, and reducing the overhanging length of the steel box girder 4 so as to reduce the installation stress.
Preferably, each jack 2 is provided with a stress monitoring device.
The stress monitoring device can adopt a force measuring instrument or other force monitoring equipment to fix the monitoring equipment and the jack 2, so that the force measuring component and the jack 2 are stressed together, the stress of the jack 2 is monitored in real time in the working process of the jack 2, and the condition that the jack 2 and a steel box girder are disengaged is avoided.
As shown in fig. 1 and fig. 2, the invention also provides a construction method for sliding the steel box girder, which comprises the following steps:
arranging a temporary support 1 between the starting point and the end point of the sliding of the steel box girder 4, wherein a plurality of grooves are distributed on the temporary support 1 along the length direction of the steel box girder 4;
at least one jack 2 is vertically arranged in each groove, and a plurality of jacks 2 are respectively and controllably connected to a first controller 5; the top of each jack 2 is provided with an electric roller 3, the shaft of each electric roller 3 is vertical to the length direction of the steel box girder 4, and a plurality of electric rollers 3 are in control connection with a second controller 6;
placing the steel box girder 4 above part of the groove;
opening the first controller 5, controlling the jack 2 in the groove to ascend to jack the steel box girder 4 until the stress of the jack 2 reaches a preset value;
and opening the second controller 6, controlling the plurality of electric rollers 3 to roll towards the direction of the termination point and driving the steel box girder 4 to move towards the direction of the termination point.
When the stress of the jack 2 reaches a preset value, the jack 2 is ensured to be in contact with the bottom of the steel box girder 4, and the situation of void does not occur, so that the steel box girder 4 is effectively supported, and the situation that the steel box girder 4 is cracked due to uneven stress is avoided.
Preferably, the jack 2 is provided with a stress monitoring device, and the stress of the jack 2 is monitored in real time through the monitoring device in the moving process of the steel box girder 4.
The lifting height of the jack can be timely adjusted by monitoring the stress device in real time.
Preferably, when the plurality of electric rollers 3 are controlled to roll towards the direction of the termination point and drive the steel box girder 4 to move towards the direction of the termination point, the stress range of the jack 2 is set, and if the stress value monitored by the monitoring device is not in the stress range, the height of the jack 2 is adjusted until the stress value measured by the monitoring device is in the stress range.
When the jacks 2 are lifted to jack the steel box girder 4, setting the stress range of the jacks 2 to be 0.95-1.05 times of a preset value, and if the stress of the jacks 2 is lower than 0.95 times of the preset value, lifting the corresponding jacks 2 until the stress of the jacks 2 reaches 0.95 times of the preset value; and if the stress of the jack 2 is higher than the preset value of 1.05 times, descending the corresponding jack 2 until the stress of the jack 2 reaches the preset value of 1.05 times. The stress range of the jacks 2 is set, so that the stress of each jack 2 is within the range, the uniform stress is ensured, and the deformation of the steel box girder 4 caused by the uneven stress of a single jack 2 is avoided.
Preferably, before the steel box girder 4 is placed above part of the groove, a guide girder is detachably mounted at the front end of the steel box girder 4 along the length direction of the steel box girder 4 through a connecting piece, and the guide girder is placed on the groove;
when the jack 2 in the groove is controlled to ascend to jack up the steel box girder 4, the jack 2 in the groove below the guide beam is controlled to jack up the guide beam at the same time;
when controlling the plurality of electric rollers 3 to roll towards the direction of the termination point and driving the steel box girder 4 to move towards the direction of the termination point, the plurality of electric rollers 3 simultaneously drive the guide girder to move towards the direction of the termination point.
Before installing the guide beam, determining the span of the steel box beam 4 sliding into the temporary support 1 at the construction bottom according to a design drawing, designing the construction guide beam, completing the construction of the temporary support 1 according to the design elevation of the steel box beam 4, and installing the guide beam at the front end of the steel box beam 4, thereby playing the role of guiding and supporting in the moving process of the steel box beam 4. And in the advancing process of the movable steel box girder 4, firstly moving the steel box girder 4 for 1m at a rolling speed of 0.2m/min, stopping moving, checking that all parts of equipment are normal, and gradually increasing the rolling speed of 0.2m/min to 0.5m/min to move the steel box girder 4 to advance. The method improves the moving speed of the steel box girder 4 and improves the construction efficiency.
The invention solves the technical problem of slow walking pushing speed in the prior art by the jack with the electric roller. The lifting jack provided by the invention has the advantages that through the cooperative work of lifting and electric roller rolling, the steel box girder is prevented from being empty and rapidly sliding in the installation process, the continuous sliding in the erection construction process of the steel main girder is realized, the sliding speed is freely adjusted, the accuracy and timeliness of temporary support elevation control in the sliding process are improved, the labor cost in the pushing process is reduced, the safety in the pushing process is improved, and the construction quality is ensured.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a device that steel box girder slided into construction, treats that construction department is equipped with temporary support, follow on the temporary support a plurality of recesses, its characterized in that have been laid to the length direction of steel box girder: at least one jack is vertically arranged in each groove, and the jacks are respectively and controllably connected to a first controller; each jack top is installed and supplies the electronic gyro wheel that steel box girder placed, every the axle of electronic gyro wheel perpendicular to the length direction of steel box girder, a plurality of electronic gyro wheel control is linked in the second controller, every be equipped with on the jack and receive the force monitoring device.
2. The device for steel box girder sliding construction according to claim 1, wherein a plurality of the electric rollers are provided with a guide beam, the guide beam is arranged along the length direction of the steel box girder, and the guide beam is provided with a connecting piece for detachably connecting the front end of the steel box girder.
3. A construction method for sliding a steel box girder is characterized by comprising the following steps:
arranging a temporary support between a starting point and an end point of the sliding of the steel box girder, wherein a plurality of grooves are distributed on the temporary support along the length direction of the steel box girder;
at least one jack is vertically arranged in each groove, and the jacks are respectively and controllably connected to a first controller; an electric roller is arranged at the top of each jack, the shaft of each electric roller is vertical to the length direction of the steel box girder, and the electric rollers are connected to a second controller in a control mode;
placing the steel box girder above part of the grooves;
opening the first controller, and controlling the jack in the groove to lift up the steel box girder until the stress of the jack reaches a preset value;
and opening the second controller, controlling the plurality of electric rollers to roll in the direction of the termination point and driving the steel box girder to move in the direction of the termination point.
4. The method for sliding-in construction of the steel box girder according to claim 3, wherein the jack is provided with a stress monitoring device, and the stress of the jack is monitored in real time by the monitoring device during the movement of the steel box girder.
5. The method for sliding-in construction of the steel box girder according to claim 4, wherein when the plurality of electric rollers are controlled to roll towards the direction of the termination point and drive the steel box girder to move towards the direction of the termination point, a stress range of the jack is set, and if the stress value monitored by the monitoring device is not within the stress range, the height of the jack is adjusted until the stress value measured by the monitoring device is within the stress range.
6. The method of sliding-in construction of a steel box girder according to claim 4, wherein a guide girder is detachably installed at a front end of the steel box girder in a length direction of the steel box girder through a connection member before the steel box girder is placed over a part of the groove, and the guide girder is placed on the groove;
controlling the jack in the groove below the guide beam to jack up the guide beam simultaneously when controlling the jack in the groove to jack up the steel box beam;
when controlling a plurality of electric rollers to roll and drive the steel box girder to the direction of the termination point, a plurality of electric rollers simultaneously drive the guide girder to the direction of the termination point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110967853.2A CN113699897B (en) | 2021-08-23 | 2021-08-23 | Steel box girder sliding construction device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110967853.2A CN113699897B (en) | 2021-08-23 | 2021-08-23 | Steel box girder sliding construction device and method |
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| CN113699897A CN113699897A (en) | 2021-11-26 |
| CN113699897B true CN113699897B (en) | 2023-02-03 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4563413B2 (en) * | 2007-02-01 | 2010-10-13 | 株式会社巴コーポレーション | Bridge girder construction method |
| CN100503980C (en) * | 2008-03-28 | 2009-06-24 | 山东省路桥集团有限公司 | Method for construction of multi-point integral top pulling steel case beam |
| CN101812828B (en) * | 2009-12-24 | 2011-08-17 | 武汉一冶钢结构有限责任公司 | Straightening machine for edge of steel box girder |
| CN102199915B (en) * | 2010-03-23 | 2012-07-11 | 柳州欧维姆机械股份有限公司 | Walking type incremental launching device and bridge incremental launching construction method using same |
| CN102587291B (en) * | 2012-03-27 | 2014-11-05 | 中交四航局第一工程有限公司 | Walking type multipoint pushing construction method and walking type multipoint pushing construction system for steel box girder |
| KR101654742B1 (en) * | 2015-02-26 | 2016-09-06 | 컨텍이앤씨 주식회사 | Movable scaffolding system mounted upper-structure of bridge and bridge construction method therewith |
| CN106284083A (en) * | 2016-08-15 | 2017-01-04 | 云南云岭桥隧科技有限公司 | Pushing tow climbs shifting formula cable crane arch bridge hanging method |
| CN108330838B (en) * | 2018-02-09 | 2019-06-18 | 重庆三峡学院 | A kind of adaptive thrustor of the multiple spot of steel box-girder |
| CN111877166A (en) * | 2020-07-15 | 2020-11-03 | 中亿丰建设集团股份有限公司 | Incremental launching construction method for bridge steel box girder with slope |
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